[libgee] Fix compilation of priorityqueue.vala on vala from git

[Maciej Marcin Piechotka <mpiechotka src gnome org>]

commit af59223970a16d394b70da050b1030d9f578e879
Author: Maciej Piechotka <uzytkownik2 gmail com>
Date:   Mon Dec 19 04:16:32 2011 +0100

    Fix compilation of priorityqueue.vala on vala from git

 gee/priorityqueue.vala |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gee/priorityqueue.vala b/gee/priorityqueue.vala
index 82e5229..b1a07ad 100644
--- a/gee/priorityqueue.vala
+++ b/gee/priorityqueue.vala
@@ -53,7 +53,11 @@ public class Gee.PriorityQueue<G> : Gee.AbstractQueue<G> {
 	private Type2Node<G>? _lm_head = null;
 	private Type2Node<G>? _lm_tail = null;
 	private Type1Node<G>? _p = null;
+#if VALA_0_16
+	private Type1Node<G>?[] _a = new Type1Node<G>?[0];
+#else
 	private Type1Node<G>?[] _a = new Type1Node<G>[0];
+#endif
 	private NodePair<G>? _lp_head = null;
 	private NodePair<G>? _lp_tail = null;
 	private bool[] _b = new bool[0];
@@ -323,7 +327,11 @@ public class Gee.PriorityQueue<G> : Gee.AbstractQueue<G> {
 		_lm_head = null;
 		_lm_tail = null;
 		_p = null;
+#if VALA_0_16
+		_a = new Type1Node<G>?[0];
+#else
 		_a = new Type1Node<G>[0];
+#endif
 		_lp_head = null;
 		_lp_tail = null;
 		_b = new bool[0];